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Method for producing garnet-based transparent ceramic through non-aqueous gel casting molding

A technology of gel injection molding and transparent ceramics, which is applied in the field of special transparent ceramics molding and manufacturing technology to achieve the effects of increased density, simple operation and strong practicability

Active Publication Date: 2018-01-05
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, no non-aqueous solution gel injection molding has been used to prepare (Y 1-a-b-x Lu a Gd b RE x ) 3 (Al 1-c-d sc c Ga d ) 5 o 12 Report on Transparent Ceramics

Method used

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  • Method for producing garnet-based transparent ceramic through non-aqueous gel casting molding
  • Method for producing garnet-based transparent ceramic through non-aqueous gel casting molding
  • Method for producing garnet-based transparent ceramic through non-aqueous gel casting molding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Will 33.5323g Y 2 o 3 Powder, 25.4903g ​​Al 2 o 3 Powder, 0.5047g Nd 2 o 3 Powder, 0.0476g MgO powder, 0.476g TEOS are added to high-purity alumina ball mill tank (alumina ball mill 160-200g), add absolute ethanol 8.85ml, dispersant (polyethyleneimine) 0.4ml, DPTA 0.4ml After ball milling and mixing for 18 hours, 1.3 ml of EGDGE was added, and ball milling was continued for 20 minutes to prepare a ceramic slurry. The calculation showed that the solid content of the ceramic slurry was 54 vol%. After ball milling, the slurry was vacuumed (-0.1 MPa) to degas the slurry for 5 min. After degassing, pour the slurry into a plastic mold, seal the mold and place it in a 40°C oven for reaction and drying. After 3 days, take out the green body that has been dried and demoulded, and do a scanning electron microscope on the green body. figure 1 As shown, it shows that the organic matter reacts to fix the particles into shape, and the surface is relatively uniform without larg...

Embodiment 2

[0052] Will 33.1940g Y 2 o 3 Powder, 25.4903g ​​Al 2 o 3 Powder, 1.0094g Nd 2 o 3 Powder, 0.476g TEOS was added to a high-purity alumina ball mill jar (alumina ball mill 180g), 8.9ml of absolute ethanol, 0.4ml of dispersant (polyethyleneimine), 0.32ml of DPTA were added and mixed for 12h, and then EGDGE 1.5 ml, continue ball milling for 40min to prepare ceramic slurry, the calculation shows that the solid content of the ceramic slurry is 55vol%. After ball milling, pour the slurry into a beaker, put it in a vacuum drying oven to evacuate (-0.1MPa) and degas for 5 minutes. After degassing, the slurry was poured into a plastic mold, left to react at room temperature for 2 hours, then dried at 40°C for 2 days, and then dried at 70°C for 2 days. After drying, the green body is taken out, and then the green body is degummed. The degumming condition is to raise the temperature to 200°C at 2°C / min and keep it warm for 2 hours, then raise the temperature to 700°C at 1°C / min and ...

Embodiment 3

[0054] Will 32.5166g Y 2 o 3 Powder, 25.4903g ​​Al 2 o 3 Powder, 2.3646g Yb 2 o 3 Powder, 0.1811g TEOS was added to a high-purity alumina ball mill jar (alumina ball mill 180g), added 8.9ml of absolute ethanol, 0.4ml of dispersant (polyethyleneimine), 1.1ml of EGDGE and ball milled for 12h, then added DPTA 0.56 ml, continue ball milling for 40min to prepare ceramic slurry, the calculation shows that the solid content of the ceramic slurry is 54vol%. After ball milling, the slurry was degassed for 5 minutes by vacuuming (-0.1 MPa) with a suction filter device. After degassing, pour the slurry into a plastic mold, seal the mold and place it in a 65°C oven for reaction and drying. After 2 days, take out the dried and demoulded green body, and then carry out debinding treatment on the green body. The debinding condition is to raise the temperature to 350°C at 1°C / min and keep it warm for 2h, then raise the temperature to 600°C at 1°C / min and keep it warm for 8h , after cool...

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Abstract

The invention relates to a method for producing garnet-based transparent ceramic through non-aqueous gel casting molding. The method comprises the following steps: weighing Y2O3, Lu2O3, Gd2O3, Al2O3,Ga2O3 and RE oxide according to a stoichiometric ratio, and uniformly mixing above oxides to obtain raw material powder, or adopting (Y(1-a-b-x)LuaGdbREx)3(Al(1-c-d)SccGad)5O12 powder synthesized by aliquid phase chemical technology as the raw material powder; adding a non-aqueous solvent, a curing agent and epoxy resin to the raw material powder, and carrying out ball-milling mixing or ultrasonic dispersing mixing to obtain a ceramic slurry, wherein the non-aqueous solvent is at least one of ethanol, methanol, propanol, ethylene glycol, acetone, butanone, cyclohexane and dodecane; and carrying out vacuum degassing on the obtained ceramic slurry, injecting the degassed ceramic slurry into a die, carrying out solidification, drying, demolding and binder removal treatment, and sintering thetreated ceramic slurry at 800-1900 DEG C for 5-60 h to obtain the garnet-based transparent ceramic.

Description

technical field [0001] The invention provides a method for preparing garnet-based transparent ceramics by non-water-based gel injection molding, which can be applied to the fields of laser, flashing, LED, optical window, etc., and belongs to the technical field of special transparent ceramic molding and manufacturing technology. Background technique [0002] Transparent ceramics are a new emerging material, which are currently widely used in optical parts of high-temperature instruments, high-pressure sodium lamps, hoods, etc. At the same time, as optical functional materials, they are increasingly important in lasers, scintillation and other neighborhoods. Among them, the garnet-based (Y 1-a-b-x Lu a Gd b RE x ) 3 (Al 1-c-d sc c Ga d ) 5 o 12 Due to its excellent comprehensive physical and chemical properties, transparent ceramics are widely used in industrial fields (lighting industry, up-conversion luminescence, LED, laser medical treatment, nuclear medical imagi...

Claims

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Application Information

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IPC IPC(8): C04B35/44C04B35/505C04B35/624
Inventor 尹瑞李江董满江寇华敏石云潘裕柏
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI